/*
   Copyright 2012 Shane Phillips

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
 */
package org.jdraw.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.logging.Logger;

public class FileIO {

	public static byte[] read(File file) throws IOException {
		Logger log = Logger.getLogger(FileIO.class.getName());

		log.fine("Reading: " + file.getAbsolutePath());
		FileInputStream fis = new FileInputStream(file);
		byte[] buffer = new byte[(int) file.length()];
		fis.read(buffer);
		return buffer;
	}

	public static void save(File file, byte[] buffer) throws IOException {
		Logger log = Logger.getLogger(FileIO.class.getName());

		log.fine("Saving file: " + file.getAbsolutePath());
		FileOutputStream fos = new FileOutputStream(file);
		fos.write(buffer);
		fos.close();
	}

	public static String getFileExtension(String fileName) {
		int lastDotPosition = fileName.lastIndexOf(".");
		if (lastDotPosition == -1) {
			return null;
		}
		return fileName.substring(lastDotPosition + 1);
	}

}
